Introduced in June with iOS 6, “Do Not Disturb” mutes iPhones and iPads to incoming calls, notifications and alerts during user-specified time periods, allowing the user to avoid distractions or get some sleep. But, starting on New Year’s Day, users around the world began reporting that the feature no longer shuts off automatically, PC Magazine notes.

The problem has been experienced by users in the U.S., Japan, China, Spain, Australia and other nations. Apple acknowledged that the “Do Not Disturb” feature is not shutting off as planned and indicated that a fix for the problem will be issued by January 7.

Until then, Apple suggests that users manually switch the “Do Not Disturb” feature off when they want to receive calls and notifications.

The new glitch is just the latest problem for Apple’s iOS. Along with the “Do Not Disturb” feature, iOS 6 also introduced Apple’s in-house developed maps app, which replaced Google‘s (NASDAQ:GOOG) long-standing maps app. Users quickly discovered errors in app, leading to a rare public apology from Apple. Last month, Australian police warned motorists not to use the app when driving to the city of Mildura, which the app showed 43 miles away from its actual location, leaving some drivers stranded in a national park.

Shares of Apple slipped fractionally in pre-market trading on Thursday.